as impressive as that is that's not the most impressive thing I've seen a monkey do. They did a study comparing chimps to bonobos, basically very similiar monkeys with some slight differences. The took each species in pair and gave them some sort of physical problem to solve in order to obtain something desireable, like food. They had to manipulate furniture or move a ladder here or there or whatever, but they couldn't accomplish it very easily on their own and the real caveat was that one of them would get left out of the "reward". The chimps did not do well at all at this test. When they realized that they couldn't do it on their own, they were in no mood to help the other because it meant they wouldn't get dick. Not so with the bonobo's. One would help the other achieve the prize knowing full well he wasn't gettin any. That's the species you gotta look out for, becuase that kind of behavior is exactly what set us apart on this planet. If we had acted like the chimps throughout our evolution we would never have built a society much more advanced than what we were when we lived in caves. We've actually become more of a "begrudging" species in the last few centuries and it will catch up to us, if it hasn't already.